A case-control study relating leukemia to exposure to non-ionizing radiation resulted in the following: In the cases (those with leukemia), there were 50 exposed and 500 non-exposed; for the controls, there were 40 exposed and 500 non-exposed. Write the necessary SAS statements to compute the odds ratio for non-ionizing radiation exposure. Make sure you have […]

You have a SAS data set called CASE_CONTROL in your CIMYDATA folder (or any other folder of your choice, or even a temporary data set). Variables are: EXPOSURE (character. values of l-yes, and 2-no), and OUTCOME (values of ‘l-dead. 2-ahve). Write a program to output a 2 X 2 table along with chi-square and the

A researcher wants to determine if soundproofing a classroom leads to better behavior among the students. In the standard classrooms, there were 30 behavioral problems from a total of 250 children. In the soundproofed classrooms, there were 20 behavioral problems from a total of 300 children. Test if room noise results in an increased number

Run the following program to generate a SAS data set DOSE, showing the number of patients having significant pain and those not having significant pain for each of three doses of medication. Compute the regular chi-square statistics and a chi-square for a test of trend. Do the proportions of patients having significant pain show a

A school administrator believes that larger class sizes lead to more discipline problems. Four class sizes (small, medium, large, and gigantic) are tested. The following table summarizes the problems recorded for each of the class sizes. Treating class size as an ordinal variable, test if there is a linear increase in the proportion of class

A randomized clinical trial compared aspirin to placebo for the prevention of heart attacks (MIs) and strokes. Out of a total of 1,000 subjects on aspirin, there were 80 heart attacks and 65 strokes; out of a total of 2,000 subjects on placebo, there were 240 heart attacks and 165 strokes. is there a significant

The relationship between office temperature and head colds is tested for smokers and nonsmokers. Since smoking is assumed to be a confounding factor in this relationship, use a Mantel-Haenszel chi-square for stratified tables to analyze the two tables here:

Three studies were conducted looking at the effects of magnesium sulfate to improve survival of a cardiac arrest. Results from the three studies were as follows: Conduct a meta-analysis to determine the overall effect of magnesium sulfate (MgS04) on survival. Check the Bristow-Day statistic for the homogeneity of the odds ratio, and determine the overall

A physical exam is given to a group of patients. Each patient is diagnosed as having none, one, two, or three problems from the following code list: The coding scheme is as follows: Using the sample data here: (a) Compute the mean HR, SBP, and DB? (b) Generate frequency counts for each of the nine

A survey was conducted where each participant was asked to choose their three favorite classical composers from the following list: The following data was recorded: Run the following program to create the SAS data set CLASSICAL. Using this data set as the starting point, write a SAS program to obtain a single frequency listing showing